/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.dtstack.taier.script.api;

import com.dtstack.taier.script.common.Message;
import org.apache.hadoop.ipc.VersionedProtocol;

/**
 * The Protocal between clients and ApplicationMaster to fetch Application Messages.
 */
public interface ApplicationMessageProtocol extends VersionedProtocol {

  public static final long versionID = 1L;

  /**
   * Fetch application from ApplicationMaster.
   */
  Message[] fetchApplicationMessages();

  Message[] fetchApplicationMessages(int maxBatch);
}
